Pile-thread holder for pile-carpet machines



"Feb, 6, 1923 3 SHEETS-SHEET 1,444,586 BOYER.

FILE THREAD HOLDER FOR FILE CARPET MACHINES. FILED NOV-26, I920.

Feb. 6, 1923. 1,444,584 F. BUYER. FILE THREAD HOLDER FOR FILE CARPETMACHINES.

FILED NOV.26, 1920- 3 SHEETS-SHEET 2- Feb. 6, 1923.,

F. BOYER. PILE THREAD 'HOLDER FOR FILE CARPET MACHINES. FILED NOV-261920.

3 SHEETSSHEET 3- it w r ire-.4. r en. ta, 19.23.

i aten FE'ENAND BUYER, OF PARIS, FRANCE.

FILE-THREAD HOLDER FOR FILE-CARPET IEACHINES.

Application filed November 26, 1920. Serial No. 426,434.

1 '0 all whom, it may concern Be it known that I, Fnns'arw Bovnn,manufacturer, a citizen of France, residing at Paris, in the Republic ofFrance, have invented certain new and useful Improvements in Pile-ThreadHolders for Pile-Carpet Machines, of which the following is aspecification.

The present invention relates to a pile thread holder for pile carpetmachines, which grasps the pile thread by means of a gripper while it isbeing inserted in the carpet and holds it -fast, until the -formation ofthe knot has been completed, and at the same time affords such an amount01 sup-- port to the warp threads, that their divergence during theaction of the knotting tools is prevented.

In the drawings I have illustrated a form of apparatus for carrying outmy present invention.

Figure 1 is a plan of a pile carpet machine in which my presentinvention is embodied.

Fig. 2 is a side elevation of the same.

Fig. 8 is a partial cross section taken on line AA, Fig. 1.

Fig. 4: is also a partial plan showing the parts of the apparatuscomprising the present invention, and

Figs. 5 to 141 inclusive are diagrammatic views illustrating theoperating parts of the mechanism in diiierent positions in tying a knotin the pile thread and holding the pile thread in position while theknot is being tied therein.

In the apparatus with which the devices comprising mypresent inventionare em ployed, there are included the same or equivalent form ofknotting tools as illustrated in Letters Patent No. 1,186,003 of April18, 1916 and No. 1,193,229, August 1, 1916. In the use of these devicesthe warp threads 1 as illustrated inthe drawings are stretched in frontof the knotting tools while the pile threads 2 are knotted or tied aboutthe warps so that their free ends form the pile oi the carpet. The'pilethread 2 is moved by a guide 3 into the path of the grippers 4 and 5which are closedend hold the thread fast. The guide 3 then movesupwardly so that the carrier pins may move in front of the warps 1 andthen the guide 3 moves horizontally and to one side so that the pilethread 2 is caused to lie at an angle to the carrier pin. Behind thewarps there are knotting hooks wardly and baokwardly in the guides 8.The guides 8 are also movable horizontally and vertically in alldirections irrespective of the positions of the knotting hooks 7. Alsoin front of the warps 1 there are knotting hooks 9 operating in guides10. These guides 10 may be swung toward the warps 1 and moved verticallyirrespective of the positions assumed by the hooks 9. Also in front ofthe warps 1 is a movable knife 11. In the operation of these devicesafter the pile thread has been engaged by the grippers a and 5 the guide3 moves upwardly and sidewise to place the pile thread at an angleacross carrier pins 6. The guides 8 then movetoward the warps 1 and apair of hooks for each group of warpspass between the warps so that twowarp threads lie between the pair of hooks. These hooks 7 then pass overthe pile thread 2 and move with the guides 8 downwardly so that the pilethread lies completely in the hooks 7. The guide 3 then moves away andthe knife 11 cuts the pile thread projecting from the guide sufficientlyfar to leave the end of the thread for the next successive operation.

When the pile thread has been cut the hooks 7 are withdrawn and carrythe ends of the pile thread with them between the warps and the pilethreads are then made fast between the hooks 7 and the guides 8. Thegrippers 4t and 5 and the guide 3 as well as the knife 11 then move awayand the guides 8 and the hooks 7 with the pile thread secured thereinmoved downwardly in order to permit the pile threads to be engaged bythe hooks 9. The guide 10 then moves toward the warps and the hooks 9are moved between the warps to engage the pile threads and to returnwith the ends of the same in such a manner as to complete the knot inthe pile thread, tying the same about the warps. These devices. however,form no part oi my present invention.

In Figure 1 the warps are diagrammatically shown, the drawing showing onthe left and right hand a number ofpile threads .2 with their endsalready drawn back over two warp threads 1.

According to Figures 2 and 3 the guides 8 for the hook 7 are clampedfirmly by means of clamping levers on bars 14, which are held in arms 13pivotally mounted on both sides of the frame of the machine.

These move forand 22 with bearing eyes 23 and 24 in which the journals25 of the rotating shaft 26 are carried. On the eyes 24 and 23 are alsocast the bar holders 27 and 28 which carry the Z-shaped continuous bar29 which is rigidly connected to the holders 27 and 28. To one arm 22 isrigidly connected also an arm 30 by means of which the shaft 26 and allthe parts carried thereon, including the bar 29 and all the parts on it,can have oscillating movements imparted to them. In the bar 29 areinserted beak-shaped pile thread holders 31 and each two are held fastby means of a screw 32 and a cover plate 33 to the bar 29. Two arms 34and 35' are mounted on the journal 25 and carry in front the continuousclamping bar 36, which is also connected by connectors 37 to the shaft26 and can therefore be rocked about the axis of the shaft 26. For thispurpose there is rigidly connected to the arm 35 an arm 38 which can beswung by a connecting rod 39 in order to transmit this oscillation tothe shaft 26 and to the clamp ing bar 36 (see Figures 1 and 2). On theclamping bar 36 are mounted clamps 40 which engage in correspondingslots in the pile thread holders 31.

The whole arrangement above described can consequently take part in thegeneral movement of the carrier 13 and at the same time also executeindividual movements determined by the connecting rod 39, arm 30 and eye18. Figure 4 shows the position of the pile thread holders, one suchpile thread holder 31 being situated between a pair of hooks 7 and itsguides 8.

The action of the apparatus is as follows The pile thread 2 is broughtin front of the warps 1. The hooks 7 move through the warps and laythemselves across the pile threads in the usual. manner. The pulling outand cutting through of the pile thread 2 then takes place (see Figure5). Figure 5 it can be seen that with the guides 10 the pile threadholder 31 is also brought withthe other parts behind the warps 1. Thehooks 7 return and take the two ends of the pile thread with them andclamp them fast on the guides 8. During this operation the pile threadholder 31 has been advanced by suitably oscillating the lever 17 (seeFigure 2) and by pulling the con necting rod 39 the clamping bar '36 hasbeen From , naa nsso raised. The clamps 4A) are protruded from the slotsinthe pile thread holder 31. The latter moves still further forward bythe opposite movement of the connecting rod 39 and the clamping bar 36is moved downwards, the clamps 40 move into the slots 1n the pile threadholders 31 and the pile threads 2 are seized and clamped fast (seeFigures 7 to 11). The hooks 7 together with the guides 8 move in thedirectlon of the arrow in Figure 13, the hooks 9 pass through thetwisted pair of warp threads 1 sideways past the pile thread and seizeon their return movement one part of the pile thread 2 (see Figure 8).The hooks 7 neXt move in the direction of the arrow in Figure 14L, thehook 9 advances again and one end of the thread lies under and the otherend over the hook 9 (see Figure 9).

' After the further advance of the hook 9 the second end of the pilethread 1s also brought into the hook and taken with it on its retirement(see Figures 10 and 11). Both ends of the pile thread 2are nowcompletely drawn through by the hook 9 and clamped fast at the guides 10(see Figure 12). At this moment the clamping bar 36 rises by acorresponding pull on the connecting rod 39, the clamp 31/40 is openagain and releases the pile thread 2. The pile thread holder as a wholemoves back into the starting position again as shown m Figure 5 anduntil operated again follows the movements of the arms 13. At the sametime the hooks 7 as above described move out of the way of the slay 12the knot is pulled tight and set in place in the usual manner. Figure 13shows in plan the position of Figure 9. In these figures the mainoperations of the working of the apparatus are shown and described. Bythe above described arrangement of a pile thread absolute certainty forthe formation of the knot is ensured and consequently also theproduction of a uniform. fault-free carpet. I

hat I claim is:

1. In a pile carpet machine, the combina tion with devices for grippinga pile thread and tying a knot therein around warp threads. ofauxiliarydevices for engaging and maintaining the pile thread in positionwhilethe knot is being tied in the said pile thread by the said knottying devices.

2. In a pile carpet machine, the combination with devices for gripping apile thread and tying a knot therein around warp threads, of auxiliarydevices for engaging and maintaining the pile thread and warp threads inposition relatively to one another while the knot is being tied in thepile thread by the said knot tying devices.

3. In a pile carpet machine in combination with a pile thread feeder,hooks for drawing a pile thread between spaced warp threads, hooks fordrawing the ends of the pile thread between predetermined warpthreads,and means ooacting with the said hooks for gripping the pile thread, ofa holder for gripping a pile thread and maintaining the same in positionrelatively to predetermined warp threads during the knotting operationby the said hooks.

4-. In a pile carpet machine in combination with a pile thread feeder,hooks for drawing a pile thread between spaced warp threads, hooks fordrawing the ends of the pile thread between predetermined warp threads,and means coaoting with the said hooks for gripping the pile thread, ofa pile thread holder, a clamp associated with the pile thread holder andadapted to cooperate with the same to grip a pile thread and maintainthe same in position relatively to predetermined warp threads during theknotting operation by the aforesaid hooks, and means for operating thesaid clamp.

5. In a pile carpet machine in combination with a pile thread feeder,hooks for drawing a pile thread between spaced warp threads, hooks fordrawing the ends of the pile thread between predetermined warp threads,and means ooacting with the said hooks for gripping the pile thread, ofa pile thread holder, a clamping bar, a clamp as sociated with the pilethread holder, means for operating the said clamp to coaot with the saidclamping bar to grip a pile thread and maintain the same in positionrelatively to predetermined warps during the knotting operation by theaforesaid hooks, and means for operating the said pile thread holder.

In testimony whereof I aflix my signature.

FERNAND BOYER.

